Assertion :The joint between the atlas and axis Is an example of a pivot joint. Reason: Gliding joint allows movement primarily in one plane.

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true but reason is not the correct explanation of assertion.

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If assertion Is true but reason is false.

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If both assertion and reason are false.

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Solution

The correct option is B If both assertion and reason are true but reason is not the correct explanation of assertion.
Gliding joint is also known as arthrodial. This provides limited movement in all direction. This is found in tarsal bones of the ankle, zygapophyses of vertebra radius and ulna.
The pivot joint is also known as rotatoria and helps in turning moment. One bone is fixed and second articulate. Atlas and axial of skull rotate with Axis vertebra.
So, the correct option is 'If both assertion and reason are true but the reason is not the correct explanation of assertion.'

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